#61
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Congratulations! Looking forward to a review
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#62
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I have been using the combo C70 + MC312 for a while now
Since I am using Acoustat Spectra 22's now, I can have review as for 6 month's used same model of speakers with the C2300 + MC302. With the C70 volume levels are higher as there is no input trim adjustment ( C2300 had input gain @ + 3db for input of dac I was using ) I do like that the tone controls are at 20Hz and 20,000Hz and leave bass @ +2db since I am running full range electrostatics. Really like having actually knobs for control's compared to most stuff being menu settings on the C2300. So far for me volume level is set at high way mark, or if playing music louder 2 leds more. Acoustats are 83 db at 1 watt, 1 meter. Compared to C2300 + MC302, sound is smoother and more dynamics. Meter's on MC312 show average of 3 watt's to 30 watt's. A lot more headroom now, if I do what I consider torture test playing Phil Collin's " I Don't Care Anymore " at 110db volume levels - meters show between 300 watts & 600 watts with power guard flashing. The MC302 would just shut down altogether and than have too wait 10 minutes to re-power amplifier. Even at extreme volumes heatsinks just gets warm not hot compared to the MC302. Higher headroom rating and double filter caps definitely improved the performance. Long term goal is to switch the Acoustat Spectra 22's for Martin Logan CLX Art or Quad ESL 2812. Dan
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McIntosh MR87 tuner, McIntosh D1100 as dac & preamp , McIntosh MC462 power amp, Apple iPad Pro 11” M2 cpu for media streaming, AudioQuest Carbon USB-C to USB 2.0 interconnect , Magnepan MG 0.7 speakers , JL Audio Dominion d110 subwoofer Last edited by miatadan; 01-18-2019 at 10:58 PM. Reason: spelling |
#63
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Hi everyone
I purchased a C70 this morning from JWJW and have a question about integrating it with a Denon AVR. I know the C70 doesn’t have HT bypass but was wondering how to achieve unity gain. Thank you in advance for your time. |
#64
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McIntosh C70 arrived today
Do you have a power amplifier with meters or a sound pressure level meter?
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Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v Last edited by W9TR; 08-25-2019 at 11:21 AM. |
#65
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I have a MC 452 and an dB app in my iPhone.
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#66
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Perfect!
Find a line level source you can plug directly into your 452. Something like a DAC or CD player. Find a 1 kHz sine test tone you can play through your source. Most music services have at least one test disc you can play. Disconnect your speakers from the amp. Play the test tone and record the meter reading on the amp. Connect your C70 to the amp, your DAC or CD player to your C70 and adjust the C70 volume until you get the same reading as you obtained with the source connected directly to the amp. Done! You have set the C70 to unity gain. You will not harm your 452 by disconnecting the speakers. Then you can run the room optimization program in your pre/pro. You don’t have to be exact here as the room optimization program will accommodate any minor differences in gain. I think the C70 uses LED’s to indicate volume so you’ll need to find the closest spot where an LED just turns on and use that so that you can reliably repeat the correct volume setting. Make sense? Tom
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Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v |
#67
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Great advice Tom!
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#68
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The problem is ... And it's a fairly good one ... Is forgetting to reduce the volume setting on the preamp when using it with a standard two ch source. I did that with a C100 for a short while and unity was something like 70 or 80 on the volume setting. After a few oopses, I replaced it with a C200, which has HT PassThru.
So just use extra caution. |
#69
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Great
That is great advice!! I will run through the steps soon now that I have my Lumin streamer connected directly to the MC452. I listen to music 4-5 days out the week but only 1 movie a week if that so I gave up on the HT bypass requirement. Thank you again for sharing the knowledge. Carlos |
#70
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On my C 2300 unity gain is 70 on the front panel display. So good point - be careful!
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Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v |
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