amplifer

Hi, first of all, I'd like to mention that I'm new to audio stuff and this forum. My father bought a dbx-Bx3 power amp back in 1986 when he was living in Japan. Since it is the domestic version, it doesn't have an input selector for the mains voltage, nor a switch for the load impedance... The...

Hi all, I'm starting to look at the possibility of replacing my Luxman LV-105. I primarily play CDs using a Sony DVD with RCA connectors, nothing to write home about, but provides good clarity in my opinion. I also use an FM tuner with RCA connectors. I've got an inexpensive Bluetooth...

Hope some of you Fisher guys can help me with this Fisher 400 I payed good money for off of the bay, been wanting one for years so I'm hoping this one turns out nice. So since I have a chance to return this I have been doing some basic checks. So far I have only been able to get a few clean...

Hi everyone. I'm picking up a Yamaha RX-V870 for $12 CAD. Does anyone have any input on this device? I'm primarily going to be using it for music. Records in particular. Hooking up a Pioneer PL-255 turntable directly to it through the phono input. As well as 2 Technics 1200 turntables...

Because I recently acquired a whole bunch of gear, in what appears to be the best Craigslist purchase/deal of my life, I want to play around with setups and some questions have been coming up. 1. Is there any reason I can’t hook up two amps to the same speaker terminals. I want to see which amp...

Hi Guys, I usually hang out on Lenco heaven but drew a blank on this question earlier. I wonder if anyone can help me ID this amp and point me in the direction of a schematic. The amp itself is not spectacular but my Dad and Uncle made a trip from Leeds to Carnaby Rd, London in 1970 - which...

Would you rather have a system with decent speakers and a poor amplifier, or a system with poor speakers and a decent amplifier?

So I got this ta 4650 recently (like 2 months ago) and it's been great so far but sometime when I use it I hear this high pitched sound in the background. sometimes there is also some crackling. I have replaced the 'killer diodes' and the rest all looked good on the inside it sounds like it...

I am trying to build a kit AM/FM radio and I have run into something strange after completing the amplifier section. The output wave form is not symmetrical. It doesn't look like clipping to me either. It looks like the push/pull transistors don't have enough current to complete the wave...

I've been researching turntables and a amp/speaker setup for the past month or so and I've now come up with more questions than answers so I figured I'd just make a post to get direct answers. The turntables I've been debating about getting have been the Pro-ject essential iii, Sony PS-HX500 or...

I picked up an HK 330B that I LOVE. I'm running my KHL Model sixes thru it and it sounds great. After some different reading on the net here and their, I got worried thinking maybe that I'm underpowering the speakers and causing damage... Anybody's thoughts on this? Is a Harmon Kardon 330...

Hi folks,, The subject set popped up for sale nearby for $90. Good deal? Newbie when it comes to purchasing these things but like to think have discerning taste in sound. I grew up with my father's Technics SA-700 played with the Technics SB-L35 speakers. Loved it. How is the quality of the...

I just bought an Onkyo M5000 power amplifier from local sales and when I plug the amp in it immediately goes into protection mode. Nothing is connected to the speaker terminals or the inputs. Any ideas where I should start looking for solutions?

I am considering placing 2.5 to 4 amp fast blow inline on my Fisher RS-Z1 receivers speaker output.150 watt ch @ 4 ohm. The speakers are B&W DM640i rated at 200 watts / 4 ohm. This would be a small insurance policy in case some unknown issue arises with speaker drivers to protect amplifier. Has...

I was looking for a thread that listed members manufacturers amp/receiver amplifier basic specifications. Didn’t see one soo..... What’s your main amplifiers specifications? Manufacturer/Brand : Years Sold: ex 1979-1981 Amplifier weight: Amplifier Class: A, B, AB. etc Power Output...

Hi guys, first of all I'm new to the forum and not exactly sure where to post a thread like this. If this is the wrong place, please tell me where I should post instead. Now to my question: Yesterday, I bought a used Dual 1229. I don't have any HiFi equipment in my own room which means I need...

Oh dear god...... When I saw this I wasn't sure what to make of it. I was pretty sure that whatever happened it was not repaired to code and it was not going to look nice under the hood. Furthermore some 1970's air conditioner is missing a power cord. This transformer is HORRIFIC...

Strong 50Hz (mains) Hum with Harmonics coming from Right Channel Only by NicholasD posted Jul 20, 2018 at 12:53 PM So I have this old(ish) AKAI AM-35 AMP that I am quite fond of & there is a solid 50Hz HUM coming from the Right Channel of it. This occurs with no inputs connected. So...

I posted here a while back that I was looking for what many considered to be the best, or their favorite, Marantz integrated amplifier. Most of the results came back either 1060 or 1200. I bought a 1060 and did an extreme rebuild on it. While I liked the general sound of it there was some oomph...

Chris from Cornerstone joins me again for this Marshall re-biasing video. This is an all original JCM 800 - 2203 that is receiving new tubes all around. Of course, a quick inspection is in order. Measurements of the electrolytic caps show that most of the caps are good, one of the filter...

Hello all, I know some of you will be bias in one way or another regarding SS vs Tube, but thought I'd throw this out to the AudioKarma world to gather some thoughts. A trade: Mcintosh MC250 for Dynaco st70 Both units are cosmetically 9/10 with zero rust or pitting Both units are in its...

Long Story Short Recapped, changed Bias and DC offset variable resistors. Broke Speaker Selector switch and managed to get it working , only Channel A and Channel B work, A+B do not work. Speaker A was working fine, so I started listening to it, 2-3 notch on volume, forgot that I have not...

B&o by Norwood451 posted Feb 19, 2018 at 6:30 PMI have older Bang and Olufsen Beomaster amplifier 2400 / 1900 that is in almost perfect condition. However, when I Plug in either of the left speaker channels there is not sound. If I plug in the right on Speaker set #1 and #2 I can get Mono...

Hello to All! I am looking for your advice, if you would so kindly take the time. I have a HK730 receiver rated at 40 wpc and a few others in my collection of equal or less power. The 730 is my favorite and everyday player with a few different speakers I interchange( Altec Santana, Large...

Hello Everyone - I'm hoping someone can provide some suggestions on how I can drive three sets of front speakers from a single amp. This is not a surround sound system - I have a few different rooms in my basement and have three sets of speaker wire run back to central location where my amp is...