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The power light is suddenly out on my MC2300 amp. Power is on, light is out. Meter lights are fine. What’s involved with changing the power light? Can someone point me to “bonehead” level of step-by-step instructions or a video showing me how?

I don’t like the push/spring terminals found in units such as the MA-6100 and MA-6200. I much prefer the barrier/screw terminals found in such units as the MA-5100. Is it possible to swap out push/spring terminals for barrier/screw terminals? Would a qualified tech such as Audio Classics be...

I just scored a nice pair of ML-1C speakers. They do not have sequential serial numbers, but they’re pretty close (L4A579, L4A590). The grill cloth behind the slats is different in each speaker. One has black grill cloth. The other has grill cloth that appears as dark brown, but on closer...

I run a C32 preamp with two MC2300 power amps in my main system. Recently, a low level hum developed, followed by a series of loud pops, prompting me to leap out of my chair and shut everything down. Suspecting one of the power amps to be the culprit, I swapped out both amps, but when I went...

I’m helping a friend put together a first-time system. He is leaning towards a pair of RP-600M speakers. I haven’t heard them myself, but as a long-time Klipsch Heritage user and fan, I like what I’m reading about the company today and these speakers in particular. I need help recommending an...

I have a pair of 1986 Industrial La Scalas with the metal K-400 horn. I am interested in swapping them out for the composite K-401 horn. Does anyone know if the K-401 is available for purchase from Klipsch? I've emailed them twice with no response.

Bill Graham Memorial Concert, Golden Gate Park, Nov. 3, 1991:

Is there any risk of running a vintage solid state amp or receiver with no speakers or inputs connected? In other words, just running juice through the unit with the lights on for an extended period of time with nothing connected. On the other hand, is there any benefit in doing so?

Just finished a wonderful trip through the Northeast and New England, which included stops at McIntosh Labs (Binghamton NY) and Audio Classics (Vestal NY). At McIntosh Labs, we got a tour of the factory floor where they still build everything from start to finish right here in the USA...

I have a pair of Klipsch Industrial La Scalas from 1980 with sequential serial numbers. These have type AL crossovers and K-55M mids. All of a sudden, I'm getting no sound from the midrange in one of them. I have ruled out any problem with the source. I checked the connections from the mid...

The L50 cabinet is for 3-5/8 slimline models 502, 504, etc. The L70 cabinet is for 3-5/8 slimline models 710, 712, etc. Anyone know if these cabinets are interchangeable, i.e. would a slimline 5 series fit into an L70, or a slimline 7 series fit into an L50? Thanks in advance.

I am a lifelong Klipsch heritage user. I currently have a pair of Belles in the family room. Strictly two-channel, driven by vintage McIntosh solid state. Lately I've been curious about the bass I may be missing out on. Any opinions on mixing in a Velodyne sub with vintage Klipsch? I'm...

Many of the late 70s Mac models had a plastic bezel on the outside of the glass face surrounding either meters (MC 2125, 2205, etc.) or radio dial (MR 78, 80, etc.). They are black plastic with a thin silver-colored edging on the front. The silver edging often becomes chipped or worn or...

My MC 2100 is clean and rust-free, but the back top edge of the chrome has an ever-so slightly rough feel to the touch. Nothing visible to the eye though. Is this the dreaded "pitting" that is referred to in many descriptions of Mac chrome? Is pitting an early sign of oncoming rust? What...

I have a Pioneer PL 61 and the anti-skating feature works fine... at least for now, and I want to keep it that way. I understand that once the anti-skating goes bad, it is most likely unrepairable. My question is, what causes it to go bad in the first place, and what can be done to prevent it?

- Is there a grounding wire? mine doesn't seem to have one. - Is there a way to set the tracking force? or is that not needed on a linear tracker? - What p-mount cartridge do you recommend? thanks in advance.

If so, what do you use and why? Am considering doing the same, thanks in advance.

From what I could tell from the Klipsch site, it is the SW series - SW10, SW12, SW15 - produced from 1993 to 94. How do these early models stack up against the later models? I am a fan of the Klipsch Heritage line and am considering supplementing my system with a sub, and would prefer to...

Anyone have experience with both? Brand bias aside, how would you compare the two? Given the years of production, probably lines up as follows: Preamp: Mac C32 vs. Spec 1 Amp: Mac MC2120/2125 or 2200/2205 vs. Spec 2 or 4 (posting this on both the mac and pioneer sites)

I have a C26, MX113 and a C28. I've been swapping and comparing each one. For some reason, with the gain settings on the power amp remaining constant, I need to turn the volume on the C28 way up to match the volume output of the C26 and MX113. Not just a little, I mean WAY up. Any...

There are a lot of ebay dealers from Hong Kong selling gold banana plug adapters for speaker terminals on Mac and other vintage hi-fi gear. I'd like the convenience of banana plugs on my old Mac amps. 1) Has anyone hear actually tried these, and if so your thoughts? 2) Why doesnt someone...

The C28 preamp as two sets of main outputs labeled left, center, right. It also has one set of line outputs labeled left, right. Which outputs (two channel, I only need left and right) should I use to connect to the power amp? Or does it make any difference? thanks in advance...

I am familiar with the older "2---" series SS models such as 2200, 2205, and 2300. Curious if anyone has experience and opinions on later "7---" series and in particular the 7270 model? How does the 7270 compare to these older models? thanks a lot...

I have some VERY basic questions about how bridging an amp to mono works. I'd like to try it with my MC 2200 and 2205 amps, which are identical amps except for the meters added to the 2205. They each run at approx. 200 watts/channel. Will bridging each amp to mono essentially double the...

I run a 2205 amp with a 32 preamp. Let's talk about amp gain settings. If minimum setting can be described as 7 oclock (all the way to the left), and maximum setting as 5 oclock (all the way to the right), is there an optimum setting? I've always run at about a 1 oclock setting (just past...