Originally Posted by Michael Bishop
I don't know if this is a plus or a minus - but according to the user manuals, the VSX-49tx weighs 64.5 lbs. and draws up to 710 watts of AC power. The SC-68 weighs 39.2 lbs. and draws up to 370 watts of AC. I'm not sure how a receiver that draws only 370 watts of AC power can produce 9 channels of 100+ watts each (or even 7 channels @ 90 watts ea.) Funny math? Perhaps the SC-68 specification sheet is erroneous? Anyone know what's going on here?
the difference between the 2 receivers' amp architecture is night & day. your 49 is class A/B & required 2x the power supply watts, transformer & capacitors than the 68's class D amps. A/B amps at best are about 50% efficient while class D amps are 80-90% efficient. the power supply rating being halved is the result...it's not needed for the same output power. you may want to read up on class D amps, wiki is a good place to start. I can attach white papers, Pioneer info, Icepower literature (Ice amps are what Pioneer used from the SC-09tx to the SC-37 generations) and lit on the latest amp design from International Rectifier. but you need to understand the basic difference between how conventional class A/B amps work & how class D amps work to appreciate the advances & changes Pioneer has made since your 49TX came out
these class D amps have switch mode power supplies in which the power is pulsed full on & full off at a very high rate, about 450-500,000 times per second. in this fashion they work similarly to how digital audio works...sampling an analog signal at a high freq....so these amps are sometimes called digital amps although they still use analog signals from the preamp and output analog signals to the speakers.
Pioneer isn't cheating on the spec. plus, test measurements by several review sites show that while several competitive models do sag a lot when more than 5 channels are driven to same power at same time, the Pioneer class D amps can maintain close to rated power at 5-7 channels driven at once. I do agree that 9 channels, they would start to sag also
no receiver on the planet can maintain rated power 9 channels driven at once
the closest receivers could come to doing that where in the era of Pioneer's SC-09TX with its 1400 watt power supply & the Denon 5805 & 5308 models.
btw- I agree with your comment about the 49tx being one of the best in its day. I owned the 49txi and 59txi models and occasionally I wish I hadn't sold my 59txi...if nothing else for its build quality & all that copper
I'd love to put it on a shelf just to look at it
The SC-09TX that replaced the 59Txi was the last true flagship from Pioneer, but it wasn't cheap @ $7K! and I still have & use mine alongside the SC-68. I use the SC-68 as a prepro into the SC-09's amps. I won't be parting with it for the forseeable future as it represents the pinnacle of receiver design & Pioneer's heyday, IMO. the 59txi would be a close second
but other than the SC-09's build quality, higher power amps and the pinache of its front panel LCD display, the SC-68 is much more advanced technologically & has much more to offer than the SC-09 for a fraction of the price
and as good as the 49 was, comparing it technically with SC-68 is not a contest
and any disappointments you may have with remote etc? look at the price difference between what the 49 cost in its day - $4500 in ~'01 dollars! - vs what the SC-68 costs in '12 dollars - $2500. something has to give...so you're not exactly making a fair comparison
I do agree the remote is probably the worst one to come out of Pioneer since the 49/59 models & even the SC-09's was a bit better. but in this day of cost cutting, razor-thin profit margins, poor economic recovery & poor company health & the fact that all A/V consumer electronic companies are really hurting...what would you have them do? - cut on a remote which can be replaced by a programmable universal remote? or cut on new amp designs, not pay for THX certification (like Denon), or use poorer quality components? keep in mind, they are directly competing with Denon 4520 at the same price point who doesn't pay to get THX certs, and the Onkyo 5010 which Onkyo charges $500 MORE for @ $3000 MSRP. I'm not apologizing for Pioneer, I am however pointing out reality in today's economy - and cheapening a remote strikes me as the least objectionable route to stay competitive
you can't have it all for 50% the price of your 49tx, not even including inflation...sorry.
just my 2c in addition to amp info. hopefully, you'll enjoy all the new formats, new processing, new features & apple/android integration & these will make up for a chintzy remote
but all comments, complaints & observations, comparisons are welcome and appreciated. I also hope you join us on the forum to help others. just be prepared for lively discussion even if we may disagree on occasion
glad you're here! Edited by ss9001 - 3/15/13 at 4:51am