Originally Posted by audiovideoholic
I have two outputs of my mini 10x10 using 2 RCA cables that are split into 4 xlrs that I had a local shop fab for me. So using two RCA outputs for 8 xlr inputs on my amps. If I cut the RCA cables and hardwire them to 2 Phoenix outputs will that give me 2vrms to each of the 8 inputs of the amps? And do I need to change any jumpers on the board for that?
Another question is about the inputs of the mini. Is there any reason for us to use RCA to Phoenix from our avrs/pre amps to raise the input voltage? Since most of us here use RCA from the avr or pre from its out but have options of either using RCA/RCA or RCA/Phoenix, thought would be good to know advantage or disadvantage in using the Phoenix inputs which have higher voltages. What is the point in having higher voltage input to the mini itself in other words?
I actually have a similar setup to what Audiovideoholic has, and I'm considering buying the 10 x10 HD box, with the 8 x 8 plugin that supports filter generation from REW's EQ functions. To be honest, the issues about voltage and balanced vs. unbalanced inputs/outputs are very confusing to those of us that aren't DIY, heavy readers of either this thread or some of the ones on HTS, and used to an unbalanced RCA world.
Here's my core setup (also an Oppo BDP-93, Lumagen Radiance Mini, and a Panny VT50, but they don't enter into this directly):
Denon 4311, running Audyssey Pro XT32
DefTech Mythos ST L/R (powered 'woofer' section), run as Small @ 80 Hz crossover
DefTech CS-8080 center (powered 'woofer' section), run as Small @ 100 Hz crossover
Deftech Gem XL surrounds, run as Small @ 120 Hz crossover
Two HSU ULS-15 subs
I'm tweaking my Audyssey Pro run with REW, and I'm thinking that a possible next step for me would be to use the MiniDSP's PEQ and more precise filtering/bandwidth (relative to a Behringer Feedback destroyer) to refine my results. The MiniDSP has broader gain/cut control than the Audyssey Pro Curve Editor, which only allows +/- 3 db adjustments to the target curve. In particular, while my current focus is my HSU subs (for which I only really need two channel input/output), I like the idea of having the flexibility to improve the mid-bass and crossover using the MiniDSP for my DefTechs as well as the subs. The DefTechs are on speaker wire and crossed as Small, so I'd EQ them (for MiniDSP purposes) as 'speakers', rather than do some odd thing with LFE inputs connected to the powered speakers and pretend they're subs.
If I go this route, I'd have the MiniDSP take the pre-outs from the Audyssey-calibrated AVR as inputs, and then have the MiniDSP output channels to an amp. Thus, I'd have the 4311 become a pre/pro, and either pick up a Class AB amp that can handle the 140 watts per channel for my five speakers that the Denon 4311 currently handles, or maybe use the SC-27 I still have at home (140 x 7, which is plenty here). The latter's Class D, so I might be introducing characteristics that impact my amplified sound in a different way than my current configuration gets from the 4311. But if I dove into the 10x10 world, I'd probably start with the SC-27 I already have as my "amp" and go from there.
Assuming that I'm picking the right MiniDSP for this 'future expansion', I'm confused about how you decide voltage requirements. Given my setup:
Do you set the jumpers to the higher voltage as a precaution? Or is it trial and error, with low signal or clipping as the deciding factors?
Would I be OK using straight unbalanced RCA-style connectors (the SC-27 also has RCA inputs, and apparently the MiniDSP has some sort of RCA inputs/outputs as well), or to get the full benefit of the signal, use RCA->Phoenix cables between both the Denon 4311 and the MiniDSP, and the MiniDSP and the amp respectively?
If this is too bizarre, and I just wanted to focus on subs, I'd just pick up a balanced 2 x 4 with the Advanced Plug-In (same questions, though, about connectors and voltage). Then I'm fine with just the 4311.
Any thoughts?Edited by sdrucker - 3/20/13 at 4:27pm