I just received the VP 180 paired with the ADA 1500 .Does the amp know that the speakers is 4ohm ? Soon to come is he M100'S .

RJ

Like me, I don’t think the amp knows anything, lol.
Damn fine choices though.

Hi Rjlitho,

Well-designed separate solid-state power amps like the ADA 1500 do not have to be "set" to a specified impedance such as 4 ohm or 8 ohms. Unlike many receivers these days, they do not have current-limiting impedance switches, which severely cut the receiver's power output to prevent overheating driving a 4-ohm load. Solid-state power amps have sufficient heat-sinking and cooling so they can easily drive 4-ohm loads without shutting down or limiting their power output.
So just connect your VP180 and enjoy its high-quality sound without worrying about its 4-ohm impedance.

Regards,
Alan

So

Thank you Alan .

RJ

I am looking for information on if something can limit the volume .I feel like there is a restriction on my volume I have to go pretty high on volume control .AV receiver is Yamaha RX A850 running 4 QS8S .ADA 1500 Running VP 180 and a smaller pair of speakers for left and right. Maybe its just my ears.

RJ

Just out of curiosity how loud (-20?-10?0?) and how far away are you from your 180 and closest qs8?

Brwsaw ,
10ft fro VP180 - forgot to mention this is when listening to music only .QS8s are behind me and 3 ft in front .My small speakers are small two 4inch mids and 1 tweeter .I am hoping to splurge on a pair of M100S very soon .I thought with the amp it would make a difference .It sounds about the same when hooked up to AV receiver .I am assuming the small speakers do not help .

RJ

how big is the room you are in. Small speakers are for small rooms and moderate listening levels. Big speakers for everything else. I cant turn my M80's up anywhere near full output, you definitely need to talk to the department of finance (wife) and order some M100's.

SocketMan
Working on it .Im pushing it with ADA 1500 VP,180 AND 4 QS8S this year .Im pushing my luck because now she has an open cheque for herself now .

RJ

Room size is 18' x 18' x 7.5'

Well one step at a time, as long as the amusement park stays open.

The 180 and Ada will obviously play nice together, you'll have power to spare at all times.
I'd double check your wiring for the correct polarity and for stray wires touching more than one terminal.
Re run YPAO after and double check the calibration using a free app on a cell phone or tablet. I usually delete the app and reload in each time I make a change in the room. Too many apps need way to many permissions, no reason they need access to your contacts etc.
If YPAO shows the 180 as having reversed polarity but you checked and it's correct ignore YPAO.
My 0.02.
Please feel free to correct me guys.

It's the source volume/signal level. If it's a bell box turn up the volume on the box or change the source db offset in your AVR settings.

If the source input signal is very low to your AVR you will struggle to get loud no matter how high you turn up the volume.

I have not gone with the ypao as of yet it is part of my AVR .MY issue is with music not so much but with my movies that i can tell .Unless I gone partially def there is not much its quite low at -34db .I went in to each speaks db and brought it up but this is for 7.1 only .
I am not finding an overall db raise ? confused ,

RJ

If im reading this correctly then, your saying once the receiver is turned to -34 turning it any higher does not result in an increase in volume? This could be caused by internal protection against clipping. Also i have found that yamaha has weak output voltage on their preouts and have trouble driving an amp to full output.Check out THis Link great explanation of preouts and amplifier gain.

The volume does increase I feel is volume is not correct to volume setting.

Thank you for the link. abit above my head.But I am going to give it a read .

I have a yamaha receiver and a Denon receiver and an emotiva pre/pro and i find that my yamaha exhibits the same results you are describing. It doesnt seem to really start producing a lot of volume until it get cranked up past -30. This is the nature of the beast really. Tell us about the smaller speakers, they may not be as sensitive as the Axiom speakers and require more power to be driven to the same volume level. Yamaha makes great equipment but they tend to be a little underpowered compared to the competition. Something else to consider is that modern gear uses logarithmic volume control vs linear that older equipment used with mechanical resistor type volume knobs. My old pioneer integrated amp is really crankin by half volume which is what many people are use to whereas my other equipment doesnt get going until about 3/4 . Search logarithmic vs linear hopefully that will make things clearer.

I truly believe that keeping all your speakers in the same family so as to eliminate any mismatch's in sensitivity and have a balanced output. There are a lot of factors to achieving a balanced and functions system. I am in no way knocking yamaha but it is my experience that the pre outs are underpowered and dont provide as much output voltage as one would normally see though i have seen some tests where they have hit 7 volts unclipped but my yamaha was not a good match for my Emotiva amps.

I see that your amp will hit full power with 2V (volts) so i dont think this is your problem.



Linear vs. Log

Potentiometers, or "pots" to electronics enthusiasts, are differentiated by how quickly their resistance changes. In linear pots, the amount of resistance changes in a direct pattern. If you turn or slide it halfway, its resistance will be halfway between its minimum and maximum settings. That's ideal for controlling lights or a fan, but not for audio controls. Volume controls have to cater to the human ear, which isn't linear. Instead, logarithmic pots increase their resistance on a curve. At the halfway point volume will still be moderate, but it will increase sharply as you keep turning up the volume. This corresponds to how the human ear hears.

I keep thinking of more things so here is another suggestion to help get a handle on all this. If you have a smartphone get an app that measures db and then use the manual setup for the reciever and see what the actual output of each speaker is. I have an actual db meter that has been calibrated and its totally amazing how accurate my iphone was with an app,definetly close enough for the average bear.

Great thank you for your help.I will get the db app .I am also hoping to get some money for my birthday in three week to help in purchasing the m100s .Then I am all AXIOM .

RJ :))))

Forgot my small speakers are similar to the M22 They are from Madison sound VIFA home Theatre .Hard to find info on them .A friend of mine purchase them for me 15 years ago and they were a kit I had to put build them .It came with box stuffing crossover and two 4.5'' mids and a tweeter the sound quite good .My neighbour has a pair of V3 M80S and was quite surprised how my speakers sounded .I was thinking of using them a reference speakers once M100s arrive .

RJ