I'm building a pair of GR-Research X-LS Encores and matching X-Subs.
The X-LS bookshelf speakers can be driven using standard speaker outs L & R. I understand the best way to connect the 2 powered subs is via RCA Out, leaving the crossovers set appropriately.
I have an AudioSource Amp100 which has only one pair of RCA outs. I could buy a Y connector and share the RCA signal to each sub but wanted to ask if there was a better way?
The X-LS bookshelf speakers can be driven using standard speaker outs L & R. I understand the best way to connect the 2 powered subs is via RCA Out, leaving the crossovers set appropriately.
I have an AudioSource Amp100 which has only one pair of RCA outs. I could buy a Y connector and share the RCA signal to each sub but wanted to ask if there was a better way?
The Stock GR Research A370PEQ plate amplifier has line-out connections and these could be simply daisy-chained to a second or more subwoofers. Since the subs are mono, you may realise that left and right channels will probably be joined via resistors in the plate amp anyway. Likewise the line-outs.
If you are using some other plate amplifier, Y adaptors would seem simple enough. Otherwise drill out the amplifier or the sub-amplifier rear panel and fit more, as per the existing sockets but note any insulating washers. You could simply wire the sockets in parallel like a standard retail "Y adaptor" or preferably add some isolating resistors in-line, usually ~10k.
If you are using some other plate amplifier, Y adaptors would seem simple enough. Otherwise drill out the amplifier or the sub-amplifier rear panel and fit more, as per the existing sockets but note any insulating washers. You could simply wire the sockets in parallel like a standard retail "Y adaptor" or preferably add some isolating resistors in-line, usually ~10k.
Thanks Ian
Do you know of a similar amp to the GR-Research SA-1?
Only the X-Sub plans that Danny from GR sent over have a rear width profile of 179mm (7.04'). After spending the afternoon ripping MDF panels to begin the build tomorrow I realise the X-Sub probably used the SA-1 because its very narrow.
Do you know of a similar amp to the GR-Research SA-1?
Only the X-Sub plans that Danny from GR sent over have a rear width profile of 179mm (7.04'). After spending the afternoon ripping MDF panels to begin the build tomorrow I realise the X-Sub probably used the SA-1 because its very narrow.
If you sum the left and right channels together with a Y then make sure you add a series resistor to each output. You don't want to connect the two line outputs directly together because any difference signals between left and right channels will appear short circuited to the output
Sorry, no ideas for equivalents, even though there are plenty of small class D plate amps available from MCM, Parts Express etc. The problems are not only the width but the internal filter response wouldn't be the same as that shown in the SA-1 product details.
You'd have to contact GR for advice there, roll your own bass filter design or just use a standard roll-off. At the price point, it won't be hugely different to standard but I think you'll wind up having to adapt a 100W or less, class D power unit. All considered, not a good situation if you set out to copy GR's old designs.
Still, this is DIYaudio, we make amplifiers and those that don't fit get modified until they do - providing the cooling arrangements (airflow) and electrical safety aren't compromised. 😉
You'd have to contact GR for advice there, roll your own bass filter design or just use a standard roll-off. At the price point, it won't be hugely different to standard but I think you'll wind up having to adapt a 100W or less, class D power unit. All considered, not a good situation if you set out to copy GR's old designs.
Still, this is DIYaudio, we make amplifiers and those that don't fit get modified until they do - providing the cooling arrangements (airflow) and electrical safety aren't compromised. 😉
Hopefully Danny from GR will come to the rescue. I choose this project for its relative simplicity. All the "brain sweat" had been done, and it was a proven design that performs well.
It looks as though the Dayton SA70 would fit physically, and looks to have the crossover control down to 40hz (Danny recommended a crossover of 55hz to integrate with the X-LS Encores, so to set the dial on the plate amp to 35-40hz).
It looks as though the Dayton SA70 would fit physically, and looks to have the crossover control down to 40hz (Danny recommended a crossover of 55hz to integrate with the X-LS Encores, so to set the dial on the plate amp to 35-40hz).
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