Chienmortbb

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.

They use ICEPower ASX modules the 350 uses the 125, the 500 uses the 250 and they seem to have used the ASX700. It is a really good module and used by Mesa amongst others..

TC Active Power Management ios either compression, limiting or a mixture of both. Lots of amps have those and don't inflate the power ratings. However to be fair to TC and other manufacturers they just use our gullibility in their marketing. Sell an XYZ-250, XYZ-500, XYZ-450 and we will all think the numbers = watts. Of course much of that beloved Valve Sound is partly due to the natural compression that is inherent in many valve amp designs, so dialled in compression may not be a bad thing especially if you are trying to emulate a valve sound. The slight of hand is then claiming that you have gained power over a similar SS amp that does not have dialled in compression.

One word or warning here. You need to check both your cone excursion and air velocity. However first use the max power graph as although the frequemcy response (Transfer Function in Win ISD) looks good you may have severe dip in maximum power at some frequency.

Funnily enough I worked for Panasonic and we had to bail out JVC ( eventually took them over) when the cost of developing VHS just about bankrupted them. They wer know in house as the Junk Video Corporation or the Junior Video Corporation. As for the power output? I will measure it but quite it is not although bothy the Bugera and the Genz Benz might struggle to keep up with the noise of a JVC fan.

I totally agree about manuactures spurious claims and when the Veyrons first came out. I dismissed them. One thing I will dissolute is that Behringer always clone other people’s designs. The Veyron takes its cosmetic cues from the Genz Benz but inside it clearly uses proprietary electronics. I would also prefer a passing nod to The Genz Benz than say the Aguilar Tonehammer amps. in terms of looks.

The TC 250 probably puts out about 130 watts with compression into 8 ohms. The MiBass outputs 100W into 8 ohms without compression. The CTM will also put out 140 watts but the extra cab will make more noise due to mutual coupling. The RH450 is much more powerful than the other amps and with two cabs will have the added advantage of mutual coupling. I

We did some testing on the Basschat 1x12 design. One large port versus four small ones. There was no contest, the four port design was making noises way before the single large port.I believe that there is less friction on the larger port and that makes for less turbulence. Real estate is a problem though as a 5" port takes up a lot of the area of a front panel. One of the reasons people rear port. Other ports are chosen to aid cabinet strength. Corner/triangular or slot ports port also act as bracing and are efficient users of space when paired with circular drivers. However they (triangular) are the worst in terms of friction. One large round driver has less surface area than any other design. Every speaker design is a compromise. It is like squeezing a balloon. A gain in one area raises problems elsewhere.

12 mS seems a lot of latency. it is 1.5 times longer than the SmoothHound in its normal state and 2.4 times longer in minimum latency