Chienmortbb

Have you got one or two ports?

Might be I will chek it for you later.

Is it the 1x15 version?

There are a few on here that can do that but you would have to post details. Driver model(s) used. Internal cabinet dimensions Port details if any. Tour design goals (what are you trying to achieve in a speaker cab) It won't take long for someone to give you an answer.

As AGEDHORSE points out in a later post, I got my maths wrong as both peak voltage and current are 1.414 times greater than their RMS values. Thersfore PEAK Power is almost twice "RMS". I have left the rest of the post intact but in the table below, Peak power should be 1414W and peak to peak 2827W all rounded to the nearest whole number. Peak of a sine wave is 1.414 x RMS and Peak to Peak is 2 x Peak. So can we believe that the Veyron is 707 Watts. Are Uli's boys playing tricks on us? Well yes to both and it is the slight of hand that causes the problem. However as has been said already, it is a loud amp and is really good value. I have read most of the guff online about power and Rod Elliott has, as usual summed it up well on his site http://sound.whsites.net/power.htm Incidently you will see a term Average power used on some HiFi sites and although not wrong, it is as wrong as RMS watts or RMS power. It should be just power but many, me included, like to say RMS to ensure that people know I am talking about the RMS voltage X the RMS Current. Of course then you have the issue of distortion. If you quote a 10% figure it will still be inflated. I am happy for 1% figure to be quoted on a bass amp although I would like better than 0.1% for HiFi

That is because AFAIK most used standard circuits. Marshall, Sound City et all used the old Mullard amplifier designs manual.

If the FULL power is 880 watts then best case would be 85% efficiency and that means about 750 watts for a class D amp and Switch Mode Power Supply. However if either power amp or power supply is linear then that would drop to sub 70% or 600 watts max of whatever type GK quote.

It ain;t love at first sight though. Attractive it is not.

Air moves out out rapidly from a tuned port as the back of my leg can testify. A hole in the cab could be a tuned port bit it is unlikely to work that we as the port length is only a few mm

Many have used the 10% distortion figure as their claimed out put as Some class D amps are rated that way. IcePower and Powersofet ERTC don't but you can still use slight of hand with those. For example the ICEPoer 50ASX2 is capable of 100W int 8ohms and 170W into 4 ohms bridged (BTL). Gallien Krueger use it in their Combos and in the little 200 Head but ICEpower only claim 170W. But then we are all guilty of assuming that a number in an amps mode; number indicates Watts

I I use a small amount of compression annd a bit of drive usually. Tonight I will go with nothing biut a flat amp from a passive bass at open mic and see if I can hack it.

Out of interest this is the the response of my BC1x12 MK2 as measured by Stevie. It does sound better than my HiFi speakers. The frequency response is the lower trace.

Nice.

Yes that would lead to a Behringer takeover of Basschat and then where would we be?

It could probably benefit from a better speaker (I think it is an old Celestion 10") but the cabinet design is unique and who knows how to calculate it?

I had the BLX 130, Basically the same but it had a beefier output stage that allowed you to use an extension cab. It was 80W without the extension cab. I loved it an wished I had not sold it. Did you know that the BLX is from Dog's BLX? Just saying.

Right now my cab is in bits as the latest iteration of the crossover plus lightweight compression driver is incorporated. I will report back when the cab is reassembled and I have gigged with it.

I only worry that DSP has too much influence over the signal. However ar Phil says, you would probably not notice it in a band situation. As for the flatness, a passive crossover can be very flat but will not be as efficient as an active crossover whether analogue or digital (DSP). However with all the power we have on tap these days it is not really an issue IMHO.

I give up. High Fidelity should mean that it faithfully reproduces the sound and I assumed that most good ones would be flat.

They use the ICEPower 50ASX2 BTL module. It may be that. Does its crackle and fizz when nothing is connected?

I was going to put this on the other thread but it is now too long and unwieldy. The term FRFR means Full Range Flat Response (as a HiFi speaker should be for perfect reproduction of sound). However it seems to have been purloined to mean an active/powered cabinet with Full Range Flat Response. It is worth saying that it is possible to design a FRFR cabinet that works with existing amplifiers . This was the design goal of the Basschat 1x12 and probably a number of commercial boutique cabinets. Many bass amps do have a particular sound (often called voicing) but this is usually in the pre-amp section and that can often be bypassed by using the power amp in or EFX return input on an SS head. So the FRFR system for you may already be close at hand but be aware that cabinets are also "voiced". It there is not tweeter or small driver in the cabinet, it will not be FRFR and many brands just chuck a nasty tweeter with no real crossover in a cab and hope it sounds good. So if you can only afford a Helix (other modelling units are avaialble) try you existing setup. it just may be what you need. For me a nice head and cabinet just feels right although I would not be upset if offered an RCF, Yamaha or QSC active PA cab as my backline at some time.

What are these funny lbs things? If only Barefaced could make it 15Kgs... ( I will get my coat).

Bill. my point was that if all other things are equal then a bigger cone will output more low end than a smaller one. If we look at tyhree drivers form the same series, i.e. Eminence Delta, We can clearly see that the 15" (Red line) goes lower than the 12" (blue) and the 12' goes lower than the 10". Of course that does not take into account the enclosure size and in this case thye 15" enclosure is 600 litres the 12" is 100 litres and the 10" is 15 litres. The fact is though that the Eminence Delta 10 can never go as low as the Delta 15 in an idealised enclosure. Clearly the Delta series are not state of the art when it comes to low frequency drivers. Cone area is one of the parameters that decide the performance of a low frequency driver but it is not the only one.

It is hard not to get technical but cone size does matter. It is just that it is one of a number of things that matter.

Me too there seems to be plenty of volume, more than I will ever need.