Bill Fitzmaurice

[quote name='Dandelion' timestamp='1508845794' post='3394784'] Providing a guitar head is used. Is the fact that it is tuned differently going to make it sound crap? [/quote]There's far more to it than tuning. Guitar drivers extend much higher in their frequency response and have short xmax, which causes them to distort at low power levels. [quote]Fender Bassman 410 combo's have been used by guitarists for many years.[/quote]That would be a reference to the '59 Bassman, and reissues of it. It's a great guitar amp because it used guitar drivers in an open back cab. By the same token what made it a great guitar amp also made it a horrible bass amp. The original was only produced for three years. [quote]Acoustic guitars sound esp good through a bass amp [/quote]If it has a tweeter true, as a guitar amp without tweeters loses a full octave or more of the harmonics of the acoustic guitar. But tweeters sound horrid with a heavily distorted electric guitar tone, explaining why guitar amps don't have tweeters.

Going from 500w to 650w won't make any difference. Depending on the tuning frequency of the cab chances are that the amp is putting out [i]less[/i] power at 40-45 Hz than at 50-55Hz, because the impedance will probably be higher at 40-45Hz than 50-55Hz. Excursion with equal voltage input is probably considerably higher at 40-45Hz than at 50-55Hz, and that's the likely source of the problem.

[quote name='TheRev' timestamp='1508663331' post='3393570'] its a BigE/MAS45, which has pretty high excursion drivers. [/quote]Long excursion maybe, but they're still only 5 inch drivers. Four of them have less cone area than a single ten.

[quote name='TheRev' timestamp='1508592587' post='3393164'] Will I even notice the difference between 500 and 650w? [/quote]No. You need to double the power to get 3dB of additional headroom, which isn't all that much. Besides, nine times out of ten what you describe is caused by your speakers running out of excursion capacity.

After all the toil and trouble you Brits went through to defeat Napoleon you go and adopt his system of weights and measures, and relegate good King Henry VII to the dust bin. What's next for you? Drinking cold beer?

Obviously? Watch this: https://www.youtube.com/watch?v=YFKT4jvN4OE&feature=youtu.be

[quote name='radiophonic' timestamp='1507814958' post='3388157'] Fender Performer Cab. 4 x 10. 150W Apparently. [url="https://www.musicgoround.com/p/640363/used-fender-performer-cab-410-guitar-speaker-cabinet-4-x-10"]https://www.musicgor...-cabinet-4-x-10[/url] [/quote]The drivers are Eminence, produced in the 14th week of 1987. The only 4x10 Fender produced in 1987 was the BXR410 Bass. What you appear to have is a Dual Showman 'Wedge' 412 guitar cab.

The standard corner radius in the US is 3/8 inch. You don't need a gauge to measure it, just a ruler and a straight edge. Place the straight edge on one surface, extending beyond the joint of the two panels, use the ruler placed on the intersecting surface to measure the distance from where the chamfer begins to the straight edge.

Since it's sealed it may be a guitar cab.

[quote name='Jus Lukin' timestamp='1506894734' post='3381909'] Just to be clear, any crossing over (crossovering?!) or signal splitting would be for creative purposes rather than fidelity- say, a clean, deep, compressed signal on one channel, and a gnarly, bass shy drive on the other. [/quote]For that purpose what works best is a bass cab and head paired with a guitar combo.

[quote name='Jus Lukin' timestamp='1506867776' post='3381613'] I'd also like to run split signals, and setting the cab handling the highs nearer head height makes sense to me. [/quote]You only want to do that with cabs specifically designed for that purpose. PA cabs are, bass cabs are not. I'd no more mix cabs than I would a 50 year old single malt with diet coke. Pick the cab that sounds best to you, if one's not enough use two, but keep them the same.

[quote name='Jus Lukin' timestamp='1506862910' post='3381559'] I'm pondering a Big Twin 2 on the bottom... then a Super Midget on top. [/quote]Why?

You use phantom power with mics that need it, typically condenser mics. SM58s aren't condenser mics. Most DIs aren't bothered being hooked up to phantom power anyway, since it's assumed that will be the case in many instances. The DI owners manual will say. BTW, I can't imagine using a DI on a guitar amp, and I don't recommend them for bass either. DIs don't capture the sound of the speaker.

I have a BMW 328, and it works the same with regular, premium or super premium. The M3 is a different engine entirely, so it can benefit from higher octane, by allowing more advanced timing. But those with the standard BMW engines only fool themselves when they think using more expensive gas saves them the price of buying an M.

[quote name='Bigwan' timestamp='1506612661' post='3379957'] The Perrier example is almost word for word the same story as the Magners cider story my brother's been telling me for 15 years. "We'll up the price and convince people to drink cider with ice in". [/quote]It's like 'premium' fuel for your car. In the vast majority of cases it works no better, but since it costs more the masses are convinced that it must work better. In fact, owners of higher priced cars feel shorted if there isn't a sticker inside their fuel filler door that says high octane fuel is at the least recommended, if not required. And then there's the 'Fender Special Design' stickers that have adorned their drivers since the 1960s. Most of the time the only thing special about them was the sticker.

[quote name='fretmeister' timestamp='1506588510' post='3379698'] I also have a hazy memory of something from Economics at school - that Perrier water (I think it was them. Or another expensive water brand) was not originally called that name. It was something else and it was sold at a LOWER price that the other brands. It didn't sell at all - it was viewed as cheap. So it was rebranded and sold at a price 50% HIGHER than everyone else and it sold. It was now viewed as exclusive and luxurious. [/quote]I can't speak to Perrier, but in the US most bottled water is tap water. The bottles it comes in cost more than the contents. It's a true testament to the notion that no one ever went broke [i](or lost an election )[/i] underestimating the intelligence of the American public.

It could be that they know that they're entering an already flooded marketplace with a product that no one really needs, and that they'll probably only sell them to owners of their electronics as a result of brand loyalty. That makes the number of cabs they think they can sell quite small, which raises the cost of building them, so they're pricing them accordingly.

[quote name='Daz39' timestamp='1506521665' post='3379317']The same waffle from the group of reasons car manufacturers have used for decades to justify ripping the UK consumer off[/quote]It's not the car makers you have an issue with, it's the revenuers. Maybe it's time to fill the Thames with tea. [quote]US prices are all before sales tax: when online purchasing I think you only pay if you are resident in the state they come from. Or something like that. It does vary by State, County and City. [/quote]It's no longer like that. By and large internet sellers have to collect sales tax, both state and local, of the buyers residence. I avoid that by living in New Hampshire, which constitutionally does not allow broad base taxes. The only major taxes are on lodging and meals, which means they're mostly paid by tourists. As for these speakers, I don't see the point. They carry a price tag that could only be justified if they had new and/or superior technology, and there's no evidence of that.

[quote name='Count Bassy' timestamp='1506521715' post='3379319'] the power transfer efficiency from the secondary to the speaker is best when the two impendences are the same, and falls off if mismatched either way [/quote]That's why some amps have multiple taps. Nonetheless you won't get more power from a tube amp by using a lower impedance load the way you do with SS.

[quote name='la bam' timestamp='1506360486' post='3378230'] Personally I always start with the following on a 3 band eq then adjust. Bass around 10 o'clock. Mids around 7 o'clock. Highs around 10 oclock. [/quote]If that works for you fine, but the response of every amp is different, as is the response of every bass and every speaker. That's why there is no rule of thumb.

Having to use less low EQ isn't a negative quality, it's a positive quality, as it increases the amp's headroom and reduces driver excursion.

[quote name='Steve Browning' timestamp='1506344414' post='3378048'] Keep the Boogie!!!! Don't forget about the passive radiator and what that adds. [/quote]It adds the same thing that a port does.

[quote]Any rule of thumb for what the low, mid and high should be set to? [/quote]Where it sounds best.

[quote name='Raslee' timestamp='1506275702' post='3377534']Orange claim the speaker will get 500 watts in either setting. I wonder how that works ?[/quote]With an SS amp the power is delivered by the output transistors to the speakers. The lower the speaker impedance the higher the current draw and therefore the higher the power. Valves deliver their power into the output transformer. Since it presents a constant impedance load current, and therefore power, is also constant.

Thus sending 150w to the cab and 150w to the resistor.