How Can Two Turntables or Tonearms Share a Phono System?
A second turntable should be ready when a record or a listening mood calls for it. So should the other cartridge on a two-arm deck. Having to unplug leads and reconstruct settings each time makes that extra source feel unfinished. We would put an easy return to either cartridge at the centre of the system: give each one the connections and settings it needs, then choose where to switch between them.
Start with the cartridges and the equipment you want to keep. A phono stage with independently configured inputs can remember two setups. A suitable external selector can let you retain a stage you value, while two separate stages keep distinct combinations ready and leave selection to the amplifier. None of these arrangements establishes a sonic ranking on its own. Decide how the sources will connect before choosing the additional cables, so the wiring serves the system you actually want to use.
Where Should the Two Turntable Paths Meet?
With two turntables, the point of selection determines what they share. A switch before the phono stage carries the cartridge signal, and the chosen cartridge uses the stage’s current settings. Selection inside a stage with independent inputs can also recall the settings assigned to that source. With two separate stages, each cartridge receives its own phono treatment before selection: the amplifier chooses between their line-level outputs.
Two arms on one deck present the same choice. They share a plinth, but their cartridges may need different gain or loading. Give a cartridge with substantially different requirements its own consideration as a source, even when it sits beside the other arm. The available sockets are useful only if each cartridge can connect to a phono input that suits it.
| Selection point | Complete connection | What makes it attractive | What can rule it out |
|---|---|---|---|
| Before one stage | Each arm to a tonearm selector; selected output to the phono stage; stage to a line input | Retains the existing stage | Unsuitable selector wiring, loading or burdensome setting changes |
| Inside one stage | Each arm to its own configurable phono input; stage to a line input | Stores the required setups in one component | Either cartridge needs a parameter the stage cannot provide |
| After two stages | Each arm to its own phono circuit; select between the resulting sources at the amplifier or a line selector | Preserves independent setups, including a suitable built-in phono stage | Insufficient space, budget or suitable downstream selection |
Think about a future cartridge change before ordering another box. Both turntables may stay exactly where they are, yet a different cartridge can change the best place to switch. A shared stage is convenient when both cartridges use the same settings. Replace one with a cartridge needing a different mode, gain and load, and the same selector may leave you making several adjustments whenever you change source.
When Is One Phono Stage With Two Inputs the Better Choice?
The value of independent phono inputs lies in the setup each input can remember, especially when the cartridges need different gain and loading. Where the stage stores settings separately, selecting the other source can restore its configuration without your rebuilding it by hand. Some stages retain those settings when powered off as well. Look for both behaviours in the documentation: two sets of sockets tell you little about what happens to the settings when you change inputs or switch the power off.
Check which input each arm can actually use before relying on that memory. One RCA input and one XLR input offer a different connection choice from two identical pairs, and the required wiring must be supported. Memory helps once the cartridge, wiring and input work together. It cannot supply a missing connection or make an incompatible cartridge suitable.
Both cartridges must suit the available mode, gain, resistive load and any specified capacitive load. Even a broadly adjustable stage may leave one of those parameters fixed. Consider a fixed MM input capacitance of 220 pF: it already exceeds a cartridge recommendation of 100–200 pF, before the arm and connecting cable add their contribution. Storing that value separately for two inputs leaves the mismatch unchanged.
We favour independent inputs for frequent source changes when both cartridges fall within the stage's operating range. One component can keep both configurations available, with fewer adjustments between you and the next record. Our condition is straightforward: both cartridges must receive the setup they need. If the second one cannot, using a single box compromises the choice that the second cartridge was meant to give you.
Can an External Selector Preserve Your Existing Phono Stage?
A tonearm selector can let you keep a phono stage you value while bringing a second arm or deck into regular use. Passive selectors explicitly intended for tonearms exist; an extra switch is not, by itself, a reason to dismiss them. Establish which signal the selector is intended to carry. A box advertised for line-level sources cannot simply be assumed suitable for a cartridge connection.
Look for documentation explaining how the selector handles the arms, channel returns and ground connections. The RCA sockets alone reveal none of that switching detail. You need answers specific to the selector: are all return paths switched, and what happens to the unselected source? If its signal role or relevant wiring remains unclear, ask the manufacturer or choose an alternative whose connections are explained before putting it between cartridge and stage.
Consider what changing sources will ask of you each time: a passive selector changes the source, not automatically its gain and loading. If both cartridges share suitable settings, turning the selector may be all you need to do. If their requirements differ, the stage must support both setups and you must restore the right one. Controls tucked underneath or at the rear can turn an apparently simple switch into a less inviting task.
An occasional change between cartridges with closely matched requirements is one thing. Reaching around the stage several times in an evening is another. We would use a selector where the whole change of source remains easy, including any adjustment at the stage. If those adjustments would put you off using the second cartridge, stored independent inputs or separate stages make better use of the equipment you have chosen.
What Changes When a Selector Adds More Phono Cable?
When assessing phono cable capacitance, count the extra lead between selector and stage as part of the cartridge's connection. The arm wiring and connecting cable contribute to the load alongside the phono input. Passing through a selector does not turn the signal into line level: it remains at cartridge level until it reaches the phono stage.
For a cartridge with a specified capacitive load, the input's capacitance setting covers only part of the total. You must also include the arm wiring, cable to the selector, relevant wiring inside it and cable onwards to the phono input. Lowering an adjustable input setting may leave room for that added wiring; a fixed input offers no such adjustment. Get capacitance figures from the cable specifications or a model-specific answer from the maker. Price, apparent thickness and a run that looks short cannot tell you the value.
A selector beside the listening chair puts its knob within easier reach, but may extend both cartridge-level connections. Placing it nearer the turntables may be more manageable, though the shared lead to the stage still contributes. Judge the complete connection from each arm to the phono input, rather than the shortest gap between neighbouring boxes. If neither connection can meet a cartridge's loading requirement, changing where selection happens can achieve more than another round of cable changes.
The electrical choices must fit the actual space too. Once you know where the components will connect, use our guide to matching the existing tonearm output and cable for the connector mapping and physical fit at the arm. Choose the cable for the distance and endpoints it must serve. Electrical suitability and a workable installation belong together: an otherwise suitable lead is less useful if installing it requires an improvised extension or adapter.
When Are Two Separate Phono Stages Worth the Extra Hardware?
With separate phono stages, each cartridge can keep its own gain and loading setup. Each arm feeds its chosen stage, and each stage's output goes to a line input on the amplifier or preamplifier. If there are too few line inputs, a suitable line-level selector can provide the choice. This is particularly attractive when you already have a stage suited to each cartridge, or two phono combinations you want to preserve intact.
One of those phono circuits may already be inside the amplifier. If its gain and loading suit the cartridge assigned to it, connect that arm to the amplifier's PHONO input. Connect the other arm to an external stage, then connect that stage's output to a spare line input on the same amplifier. The amplifier's selector chooses between them. Independent phono treatment can use the built-in stage, so it need not mean two external boxes. Both sources still receive their phono treatment before the amplifier selects one.
Two stages can also help when the turntables are far apart. Placing a stage near each source lets you select after phono amplification, with line-level connections carrying the signals onwards to the amplifier. Moving selection downstream changes which wiring contributes to the cartridge load. The line-cable length and selector must still suit the system, but this arrangement can spare a distant turntable an unsuitable cartridge-level connection to a central switch.
Count the external stage's power connection, shelf space and line-level wiring when weighing the extra hardware. As with a selector, the price of the stage tells only part of the story. We would focus on the independence that the second stage gives you. If one stage already suits both cartridges and its settings are effortless to change, another may add little practical benefit. When the cartridges need different arrangements, that extra box can make daily listening simpler.
Keep the outputs separate until the amplifier or selector chooses between them. A phono-stage output belongs at a line input, not another phono input. A Y lead cannot perform source selection: directly joining two active line outputs can make their output circuits drive into one another. A Y connection at cartridge level also fails to choose which cartridge feeds the stage. Reject it there for that reason, without assuming damage to passive cartridges. Use a selector at either point so that the sources remain separate until one is chosen.
How Do You Switch Without Losing Each Cartridge Setup?
Choose cartridge gain settings to suit the cartridge and phono stage combination, rather than a favourite position of the amplifier's volume control. It is normal for two sources to call for different volume positions. Too little gain may leave the output insufficiently amplified; too much can make it excessively loud or distorted. Follow the cartridge and stage guidance for gain before judging how well the two sources work together.
Keep the routine short enough to use easily. With independent stored inputs, check the recalled setup when changing source. With a selector and shared controls, keep a concise note of each cartridge's mode, gain and loading values where you need them. Separate stages can retain their configurations while you change the downstream input. Restore only the settings that the change of source requires, so a record change stays free of unnecessary setup work.
Before changing sources or settings, follow the equipment's switching instructions, using the system's mute or reducing the listening level as appropriate. Some stages automatically mute during settings selection; rely on that feature where it is specified, rather than expecting it from every external selector. Check the selected source and its settings before bringing the listening level back up. If the level changes abruptly, look at the configuration before attributing greater dynamics to one cartridge.
Another cartridge connection may bring additional ground connections too. Follow the manuals for the arms, stages and selector: hum can arise from a missing connection or from a loop. Keep signal grounding consistent with the specified connections, and never remove mains protective earth. Ordinary source selection should leave those connections in place once they are established. When comparing the sources by listening, bring playback levels reasonably close before drawing conclusions.
Which Arrangement Will Make Both Sources Worth Using?
The phono system layout we would choose is the one that keeps both cartridge setups ready for a change you will happily make. If you are buying a new stage and change sources frequently, independently configurable inputs are a strong starting point, provided their settings and connections suit both cartridges. They keep both sources available, including the details most easily forgotten when making adjustments by hand.
A stage central to the system deserves to stay if both cartridges can use it comfortably. A tonearm selector with clearly specified connections is then an attractive choice, especially when the settings stay the same or are quick to restore and the extra wiring meets the loading requirements. Keeping equipment you value is reason enough to consider a selector. Awkward controls or added cartridge-side cable weaken that appeal if they make the second turntable inconvenient to use.
Separate stages make sense when independence solves the difficulty: different required setups, two established phono combinations, or placement that favours a stage near each source. The additional hardware then serves a purpose every time you listen. A second analogue source should widen the records and presentations you reach for. Choose where to select between the sources, preserve what each cartridge needs along the way, and make that selection easy enough to keep both in regular use.
