Re branded for the Canadian market, this Noresco 2570 is a Rotel RX-402 from the 1974-1976 era.
Conservatively rated at 25WPC into 8 ohms this little receiver sports a robust power supply with a hefty transformer and two Elna 6800uf filter caps. It is unusual to see such large caps in a 25WPC receiver. Rotel rated the RX-402 at 40WPC into 4 ohms which this unit easily sounds like.
The build quality is exceptionally clean on this unit. With such large capacitors for its' rated WPC the sound is very robust with the loudness switch off, similar as a tube amp.
My first foray into Rotel was back in the early 80's with the purchase of my first budget audiophile amp the Rotel RA-840BX amplifier. I had this unit for over 25 years and was a formidable, over built 40WPC unit capable of driving any speakers I could throw at it.
So far I have paired this unit up with the Mission 770 Freedom IV's and this unit does everything right, tight full bass, clear mid range and nice sparkling highs. I always opt to run these units without the loudness switch on as it gives a proper indication of how robust the power supply is.
(The difference with tubes vs. transistor amps is tubes give you a full sound stage at low volumes where as transistors usually sound best when they have some power coursing through them, Tubes sound amazing from the 1st. watt all the way through to they peak out. Transistors usually do not give you that fullness until 5-10 watts per channel.)
This unit was in exception condition, super clean on the inside, the wood case was immaculate, only one bulb needed replacing although the stereo indicator bulb will not work even though I soldered in a new bulb. The silver brushed face plate is blemish free. Once apart I cleaned all the pots and switches.
Noresco is probably a brand that gets ignored in the used market which is good for anyone wanting a fantastic Rotel receiver that was built with quality first. Unlike those who clamor over the same era Pioneer, Marantz, Sansui and Kenwood should find incredible value in either the Noresco line or Rotel's of this era.
Conservatively rated at 25WPC into 8 ohms this little receiver sports a robust power supply with a hefty transformer and two Elna 6800uf filter caps. It is unusual to see such large caps in a 25WPC receiver. Rotel rated the RX-402 at 40WPC into 4 ohms which this unit easily sounds like.
The build quality is exceptionally clean on this unit. With such large capacitors for its' rated WPC the sound is very robust with the loudness switch off, similar as a tube amp.
My first foray into Rotel was back in the early 80's with the purchase of my first budget audiophile amp the Rotel RA-840BX amplifier. I had this unit for over 25 years and was a formidable, over built 40WPC unit capable of driving any speakers I could throw at it.
So far I have paired this unit up with the Mission 770 Freedom IV's and this unit does everything right, tight full bass, clear mid range and nice sparkling highs. I always opt to run these units without the loudness switch on as it gives a proper indication of how robust the power supply is.
(The difference with tubes vs. transistor amps is tubes give you a full sound stage at low volumes where as transistors usually sound best when they have some power coursing through them, Tubes sound amazing from the 1st. watt all the way through to they peak out. Transistors usually do not give you that fullness until 5-10 watts per channel.)
This unit was in exception condition, super clean on the inside, the wood case was immaculate, only one bulb needed replacing although the stereo indicator bulb will not work even though I soldered in a new bulb. The silver brushed face plate is blemish free. Once apart I cleaned all the pots and switches.
Noresco is probably a brand that gets ignored in the used market which is good for anyone wanting a fantastic Rotel receiver that was built with quality first. Unlike those who clamor over the same era Pioneer, Marantz, Sansui and Kenwood should find incredible value in either the Noresco line or Rotel's of this era.
My buddy just picked up Yamaha NS-690's from you and told me about your blog. Great info here. Agree there were some good values in the lesser known names back then. My first stereo gear purchase at A+B Sound in 1983 I believe, was a Vector Research VRX-9000, which i paired with new AR58B's. I still have both, but they are back-ups to my back-ups now.
ReplyDeleteThanks for your post. I just picked up a 2570 at a yard sale for $5 (CDN). Sat in a dry basement for many years judging by the dust. Blew it out, deoxit on all controls and switches, quick test OK, then fully cleaned and working great. Next test with my Gerrard SL-3 turntable, JVC 40W speakers and Led Zepplin 1.
ReplyDeleteJeff in Huron County
I have a Noresco 2570 that my wifi (when she was young) bought in 1977. It works with my computer, I use it everyday as an audio unit on my PC... You're right ! this unit is incredible, caps never got replaced, not pot cleaning so far after almost 40yrs, I replaced only the tuner display bulbs, the "STEREO" indicator still original !!! I intended to replace all bulbs to LED type that I will make myself (I'm an electronic engineer/technician).
ReplyDeleteIf anyone search for a good quality receiver without paying big bucks for a Marantz or else, go for it, a Noresco will satisfy you !!
Thats a sweet amp, I own one and I just realised the double knobs for bass and treble, gives it a unique touch. Great sound good looking amp!
ReplyDelete