Bill Fitzmaurice

The gasket on the front is so you can rear mount them, though that's seldom done today other than in horn loaded cabs. They should have a gasket on the rear of the flange as well, 'tis puzzlement why they all don't. They can be sourced.

You may use 18mm in just about any cabinet. The reason most well designed cabs don't use it is that with adequate bracing 12mm is sufficient with less weight.

Varying the size of a sealed cab by a moderate amount has little effect on the result.

That sound is 95% technique, 5% gear. Bootsy Collins was one of the first, and is still one of the best funk players. Bootsy could play a washtub bass and it would still sound like Bootsy.

My preference is blowing out. Blowing in can result in dust accumulation on the heatsink, reducing its effectiveness over time. I've seen fans with filters to prevent dust from ending up inside, on computers, but not on amps. They're not a panacea either, you have to periodically clean the filters. Pro-sound rack mount power amps can be either in or out flowing, with the fans on either the front or back. With those I've seen occasions where an out flow from one amp can get pulled into the in flow of another amp, leading to a very uncool result.

That's a great driver, but probably overkill/overpriced for your needs.

There's more than one Delta 10. The A version, 8 ohms, has 3.5mm xmax, which is adequate. The B version, 16 ohms, has 1.8mm xmax, which is not adequate. 1.8 mm versus 3.5mm xmax means the B will only take half the voltage, one quarter the power, before heavy distortion occurs. Even the A is no prize, with a resonant frequency (Fs) of 66Hz it's best employed as a PA midbass, with separate subs handling the lows. Both the Alpha 10 and Beta 10, with Fs of 50 and 53Hz respectively, are better for electric bass.

From the little I've seen about OEM grade SICA they may not be anything great either. I'd investigate them further before going to the trouble of putting them in.

With only 1.8mm xmax they're not suitable for electric bass. That's roughly half the absolute minimum I specify for use in any of my designs. I guarantee the seller looked at inches and watts and nothing else.

The chart on the LaVoce site is with the driver mounted in a wall. That's how raw driver response is measured. It doesn't reflect response when in an enclosure, which totally changes low frequency response. It should only be used to compare the half-space response of various drivers above 200Hz.

OK, I see that on the catalog page. It's wrong. The low frequency limit is determined by the combination of the T/S specs and the cabinet alignment, so you can't assign an arbitrary number to the low frequency response. Your model is accurate.

Flux is flux, it doesn't matter if the source is neo, ceramic, alnico or field coil.

According to what?

+1. A pair of 2x10 are a lot easier to pack and haul, they can be vertically stacked for much better results than a 4x10, and you can leave one at home when you don't need both. By the looks of it the amp will fit into a standard 19 inch rack case.

I should have been more specific. It was AM radio, with dash board mounted speakers. Gosh awful. Even basic car radios today are far better. I recall an early recording session I did, circa 1970, where the studio monitors were Altec A7s. We listened to the playback and it was quite good. Then the engineer said 'And here's what it's going to sound like in your car', and he switched the playback to a couple of 6x9 inch speakers, with the signal high passed at 100Hz, low passed at 5kHz. It was enough to make one cry.

There is absolutely no data that's of any value in their ad copy. I'd no more take a chance on that than would I on a car that that lists horsepower as 'a lot', 0-100 KPH as 'really fast', and fuel economy as 'quite good'.

Not from personal experience. The only cabs I use are the ones I built. But Barefaced does seem to use better quality drivers than most.

The Basslites come with spades, as do most of the price point Eminence. The higher end in-line Eminence have push terminals, but I've seen OEM Deltalites with spades.

Some was recorded direct, some was recorded through their home built mixing console. Either way there wasn't much there below 70Hz. It wasn't so much because they needed to prevent stylus jump, RIAA equalization took care of that. The main reason was that the primary playback system of the time was car radios, so the sound was mixed to give the best possible result when listened to in a car.

OEMs usually use spades because they're cheaper. In-line drivers tend to use spring loaded binding posts because they're preferred by the DIY crowd. There's no particular advantage to one or the other.

'Divots' and cups to line them can be added. Penn-Elcom is the most likely source of cups.

Business marketing 101, you don't sell the steak, you sell the sizzle. However, with some due diligence you can tell if the steak is a prime cut of filet or a cheap cut of chuck. The Trickfish ad copy says they use Eminence neo drivers. That narrows down the possibilities to Basslite, Deltalite II or Kappalite frames and motors. They claim 300 peak (which is in itself a red flag) power handling. That narrows it down to Basslites. They won't be off the shelf Basslite 2010, or 2012 , but with a given frame and motor you can only do so much. In many cases the only difference between an off the shelf Eminence and an OEM is that the OEM has spade connectors rather than spring loaded binding posts, and the reason for that is spade connectors are cheaper. All available evidence points to Barefaced twelve inch drivers having a Kappalite frame and motor. That's hugely different from the Basslite.

With only 25 watts you should consider not trying to get deep lows. In another thread the 30w Ampeg B15 is mentioned, with respect to how one can drive a goodly sized room with it. The answer is that the speaker is high Q, which results in a strong peak in the 80-120Hz region, at the cost of deep lows. If you doubt that is low enough, listen to any Motown recording from the 60s and 70s. That's what you're hearing. The technical term is damping. There's no mystery about it at all, you can model what it does in WinISD and HornResp, and I suspect other programs as well. The parameter you model is Qa, absorption losses. WinISD defaults to a value of 100, which is a bare box. A value of 50 is a with the cabinet lined, 10 is filled, 5 is filled and compressed. The result is seen on the SPL chart, the reason for the result is seen on the impedance chart.

The main difference between a bass and a PA driver is who it's marketed at. The 3012HO and 2515 in my bass cabs are marketed as PA drivers. I don't look at marketing blurb, I only look at the results.

Maximum output isn't about watts, it's about sensitivity and cone displacement. If you have two tens sensitivity and cone displacement are the same, and so is maximum output, whether they're driven by one amp or two.