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Old 11th October 2008, 18:21   #46
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Oh SAM... definitely I remember learning about tri-phase over crutchfield some years back.. all I was refering to was the weird installation techniques.

Generally, none of the freindly neighbourhood install walas know what is the relevance of 2 ohms, 4 ohms, svc, dvc.. for them dvc means more power and no matter what sub you bring in..they'll tune only in one fashion, forget passive crossover, they'll faint hearing this!

Gain: Full; Bass Boost : Full, Cutoff: Flat = Awaaz : Rapchik!
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Old 11th October 2008, 19:05   #47
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Quote:
Originally Posted by panky12345 View Post
Oh SAM... definitely I remember learning about tri-phase over crutchfield some years back.. all I was refering to was the weird installation techniques.
Sir once again I humbly remind everyone. Tri-phase is viper (Nobody dare eat my khakra) - this is tri-MODE.
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Old 29th October 2008, 21:25   #48
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How are BOSS amps?? I was looking at this amp with below mentioned specs:

[COLOR=#123476]Boss DD2600 - Boss Diablo 2600W 1 Channel Amp[/COLOR]

MAX POWER, 1 OHM: 2600w x 1
MAX POWER, 2 OHM: 1900w x 1
RMS POWER, 4 OHM: 900w x 1
RMS POWER, 2 OHM: 1350w x 1
FREQUENCY RESPONSE: 20-1500Hz
SIGNAL-TO-NOISE RATIO: > 100 dB
DIMENSIONS: 11"W x 2-5/16"H x 12-3/16"L
DIABLO CLASS D MONOBLOCK AMP FEATURES
Remote subwoofer control
Line out (for system building)
Variable low pass crossover (24dB/oct)
Variable bass boost 0 to +18dB
Strapping capability:
Strap two amps together for twice the power
Input sensitivity selector
Variable subsonic filter (24dB/oct)
Phase switch
Power and protection LEDs


What do you guys think. Is it worth buying it.
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Old 29th October 2008, 22:15   #49
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BOSS is total crap. Stay away from it.
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Old 30th October 2008, 06:01   #50
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Quote:
Originally Posted by gunbir View Post
I have always assumed that as well.
Quote:
Originally Posted by Sam Kapasi View Post
I am willing to be corrected, but in my belief, all amplifiers that are capable of being bridged (i.e. one channel pre designed to be out of phase with the other and all that) are also capable of being tri-mode.
Look at the figure in Sam's post (post 36).
Tri-Mode Power Dissipation

I was not refering to the amplifier's topology but more tothe current handling and damping factor of the amp. For a amp to capable of being used in trimode it must be stable in 2 ohms stereo and 4 ohms mono. It should eb capable of producing X watts per channel 4ohm/stereo, 2X watts per channel 2ohms/stereo AND 4X watts 4ohm/mono.

Sufice to say that for an amp to safely operate in trimode i'd be happier if the amp was stable at 1ohm stereo. This is becuase a speaker'simpedance is NOT linear the impedances mentioned are nominal - for example the impedance of a woofer might be 6ohms at 100Hz but 2.5 ohms at 40Hz. So trimode is safer with speakers of higher nominal impedance.
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Old 30th October 2008, 14:48   #51
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Quote:
Originally Posted by navin
X watts per channel 4ohm/stereo, 2X watts per channel 2ohms/stereo AND 4X watts 4ohm/mono
.
I've mostly only seen X watts per channel 4ohm/stereo, 1.5X watts per channel 2ohms/stereo AND 3X watts 4ohm/mono.
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Old 5th November 2008, 19:43   #52
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Quote:
Originally Posted by low_bass_makker View Post
BOSS is total crap. Stay away from it.
Ok, so what about this amp:
  • Rated Power 12.5 V Stereo: 45W RMS x 6 @ 4 ohm, 75W RMS x 6 @ 2 ohm
  • Rated Power 12.5 V Bridged: 90W RMS x 3 @ 8 ohm, 150W RMS x 3 @ 4 ohm
  • Rated Power 14.5 V Stereo: 70 W RMS x 6 @ 4 ohm, 110 W RMS x 6 @ 2 ohm
  • Rated Power 14.5 V Bridged : 140 W RMS x 3 @ 8 ohm, 220 W RMS x 3 @ 4 ohm
  • THD at Rated Power: 12.5V: <0.08% THD, 20 Hz - 20 kHz, 14.4V: <1% THD, 20 Hz - 20 kHz
  • S/N Ratio: >104 dB referred to rated power (A-weighted, 20 Hz – 20 kHz noise bandwidth)
  • Frequency Response: 10 Hz – 25 kHz (+0, -1dB)
  • Damping Factor: >200 @ 4 ohm per ch. / 50 Hz, >100 @ 2 ohm per ch. / 50 Hz
  • Slew Rate: ± 22V / µs
  • Input Range: 200mV – 8V RMS
  • Dimensions (L x W x H): 17.70 in. x 9.25 in. x 2.50 in., 450 mm x 235 mm x 63.5 mm
  • Class A/B Six-Channel System Amplifier
  • Patented Technology: Absolute Symmetry™ Class A/B Circuit (U.S. Patent #6,294,959)
  • Differential-Balanced Input Topology: For superior noise immunity, RCA jack inputs
  • On-board Crossover: State-variable, 12dB / octave Butterworth with continuously variable cutoff frequency selection from 50 – 200 Hz. Configurable as Low-Pass or High-Pass
  • Bass EQ (Channels 5&6 only): +6 dB fixed frequency, fixed 'Q' (defeatable) with port for optional remote bass control (RBC-1)
  • Speaker output connections: Accept up to 8 AWG wire
  • +12V and Ground connections: Accept up to 4 AWG wire
A-6450 - JL Audio 6-Channel System Amplifier

[SIZE=3]This is a 6 chl Amp, thinking of it because i might not have to buy a Mono, if i run front comps, rear coak and the Sub in Bridged Mode. What the Max i can pull out of this amp for the SUB in Bridged mode??? [/SIZE]
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Old 21st November 2008, 19:34   #53
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If i get the amp from US, how much do i need to pay for the duty. I have heard that you can skip duty on the products if you show the price less than actully it was bought for. Can any one tell me what is the price limit from which the duty needs to be paid. I mean if i buy the amp for $400, will i need to pay duty?
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Old 22nd November 2008, 19:38   #54
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Quote:
Originally Posted by nitinralli View Post
... I have heard that you can skip duty on the products if you show the price less than actully it was bought for. ...
That ploy does not work - the duty is calculated on the MRP, which they are able to figure out no matter which brand you buy. If they think you are trying to pull a fast one on them, they will slap you with a penalty as well.

Whether duty is applicable or not depends on the value of ALL the stuff that one is getting in the baggage. If you are under the INR25K limit, and the amp is the only electronic stuff that you are carrying, they might just let you through. If on the other hand, you have a ton of other stuff also, duty will be levied on all of it.
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Old 23rd November 2008, 03:13   #55
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I just got an Eclipse Mono from US without any customs hassle!
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Old 23rd November 2008, 08:59   #56
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Quote:
Originally Posted by superbhikari View Post
I just got an Eclipse Mono from US without any customs hassle!
i also got an amp from europe without paying any custom duty . the simple way to be safe is to bring the amp without box and show that it is second hand. i once got a handy cam similarly without paying any custom duty.
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