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Post by marcl on May 12, 2023 12:44:51 GMT -5
The MiniDSP MIGHT have jumpers to set a higher output level... or different output level options on the products themselves. Actually, the 2x4HD has two levels of output, 2V and 4V, which can be set by changing the internal jumper. Just read Marc's post above, he's correct. The INPUT is adjustable, not the output. sorry. It's the 2x4 Balanced that has both ... Balanced inputs: Max 4Vrms /1.8Vrms based on jumper. Balanced outputs: Max 4Vrms/2Vrms based on jumper. |
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on May 12, 2023 13:01:59 GMT -5
I'm not sure what you mean by "suitable one for the Hypex 252".... If you've got a little bit of circuit design and building experience you can build a simple buffer pretty easily... Each channel requires, at minimum, one op-amp, and a pair of resistors to set the gain... And you'll need to find some power to run it... If you're building a cabinet for the Hypex modules you can build this on a piece of perf-board about an inch square (or you can probably find an "audio preamp/buffer board kit" on eBay or AliExpress for a few bucks). That sounds like it may be a legitimate limitation. I phrased it that way because often things like preamps and AVRs can actually put out more than their "rated maximum"... However, I have heard output level described as a limitation with MiniDSP, and that is a rather high input voltage requirement on those amps. If I were him I would look carefully at all of the detailed specs on everything involved.... The MiniDSP MIGHT have jumpers to set a higher output level... or different output level options on the products themselves. And some of the amps also MIGHT have jumper settings to set them for higher gain... (And, if he's actually a DIY sort of person, a simple "preamp buffer" with a gain of 2x or 3x would solve the problem too.) I checked and the 2x4 HD spec says it has jumper selectable input sensitivity 2V/4V ... Max output 2V. In an earlier post I think the preamp buffer idea was mentioned, but there isn't a suitable one for the Hypex 252. Meanwhile, I recalled and verified that ONE of my amps - a Crown XLi800 - has selectable input sensitivity 0.775 or 1.4V. |
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Post by marcl on May 12, 2023 13:18:39 GMT -5
I'm not sure what you mean by "suitable one for the Hypex 252".... If you've got a little bit of circuit design and building experience you can build a simple buffer pretty easily... Each channel requires, at minimum, one op-amp, and a pair of resistors to set the gain... And you'll need to find some power to run it... If you're building a cabinet for the Hypex modules you can build this on a piece of perf-board about an inch square (or you can probably find an "audio preamp/buffer board kit" on eBay or AliExpress for a few bucks). I checked and the 2x4 HD spec says it has jumper selectable input sensitivity 2V/4V ... Max output 2V. In an earlier post I think the preamp buffer idea was mentioned, but there isn't a suitable one for the Hypex 252. Meanwhile, I recalled and verified that ONE of my amps - a Crown XLi800 - has selectable input sensitivity 0.775 or 1.4V. I meant commercially available as eris0xaa was talking about in an earlier post. Apparently there are for the Hypex NC500 and Purifi. |
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