hello, newbie help needed

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pinegrasss

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hello, newbie help needed
« on: 21 Feb 2018, 06:58 am »
i read somewhere that infinity Kappa's eat amps for breakfast...... i just purchased some Kappa 7s and i'm wondering if my Jolida has enough power to keep them running for extended periods of time

Kappa 7 / 7A

Introduced: 1987
Dimensions: 94 x 43 x 31 cm
Bass: 1 x 30 cm
Mids: 1 x Kappa-Polydome
Highs: 1 x EMIT
Suggested for amplifiers with: 40-200 Watts per channel
Frequency range: 37 Hz - 45 kHz
Crossover frequencies: 800 Hz, 4500 Hz
Suggested price (pair): 1500 $


Nominal Impedance: 4 to 6 ohms
Power Rating: 40-200 watts RMS
Efficiency: 88 dB @1 watt, 1 meter
Crossover Frequencies: 800Hz, 4500Hz
Frequency Response: 37Hz-45kHz +/-3dB
Introduced in 1987
Discontinued 1989



Specifications: Jolida SJ502A

Maximum Power Output:85 wpc at 8 ohms, 1KHz Rated Output:60 wpc at 8 ohms, 25Hz to 60KHz Frequency Response:(at 1 watt into 8 ohms) 8Hz to
130KHz + 1dB
Bandwidth:15Hz to 80KHz + 3dB; 0dB 60 W 1KHz
Distortion THD:Less than 1% at 20 V output, 28Hz to 15KHz
Circuit Type:Ultra Linear, Class AB
Input Impedance:100Kohms
Input Sensitivity:600mV at 1KHz for 60 watt output-
Output Impedance:4 ohms and 8 ohms Negative Feedback: Less than 5 dB Noise and Hum:85dB below rated output
Tube Complement:2 matched pairs (4) of 6550/KT88 power output; 2 pcs. 12AX7A/ECC83 pre-amplifier; 2 pcs. 12AT7/ECC81 power drivers.
Power Requirements:110V-120 VAC 60Hz 180 watts-standby, 450 watts maximum (220 VAC 50Hz option). Dimensions:17 inches (43cm) wide by 1 5 inches (38cm) deep by 7.5 inches (19 cm)
high.Weight:39 pounds (18 Kg)
Price $1100 new, average used $650-$700

JakeJ

Re: hello, newbie help needed
« Reply #1 on: 21 Feb 2018, 02:04 pm »
Hello and welcome to AC, pinegrass.

Unless you listen at rock concert levels you should be fine.

SoCalWJS

Re: hello, newbie help needed
« Reply #2 on: 21 Feb 2018, 03:49 pm »
Welcome to AC!

No clue how they will hold up to your specific Amp. I remember selling some earlier version of similar Infinity Speakers in the Stereo Store I worked at many many years ago. We didn't sell very many, but every time we sold them, either they came back Blown, or the Amplifier did. Seems like they must have had an interesting Load.

Give it a shot, but don't push the Speakers or the Amp too hard.

ArthurDent

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Re: hello, newbie help needed
« Reply #3 on: 21 Feb 2018, 04:46 pm »
Greetings & Welcome to AC pinegrasss   :thumb:

Phil A

Re: hello, newbie help needed
« Reply #4 on: 21 Feb 2018, 05:10 pm »
Welcome. From memory, those speakers have a very low minimum impedance

FullRangeMan

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Re: hello, newbie help needed
« Reply #5 on: 21 Feb 2018, 08:27 pm »
Welcome. From memory, those speakers have a very low minimum impedance
+1 88dB at low impedance its not a sweet peach.
At this W rate the Jolida will run fine.

Bemopti123

Re: hello, newbie help needed
« Reply #6 on: 21 Feb 2018, 10:09 pm »
Does this have a toggle switch in the rear to have more "extended bass"? 
If it does, be careful.  I have a pair of Kappa 9s, which I drive with a H2O S250 Icepower amp that weights about 65 lbs.  It has a linear PS with a double transformers.  They output about 350 watts at 8 ohms and can go down to 1 ohm.  But mine are the Kappa 9s yours are the Kappa 7s.  It might be a different beast but look for the toggle switch.  Kappas are always happy when you have plenty of available high current power.

richidoo

Re: hello, newbie help needed
« Reply #7 on: 22 Feb 2018, 01:17 am »

pinegrasss

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Re: hello, newbie help needed
« Reply #8 on: 22 Feb 2018, 05:42 am »
thanks guys, no toggle switch at rear, maybe only for the kappa 8s and 9s, and yeah i came across that amp advice page http://www.soundfountain.com/infinity/kappa7a_1.html a couple of days ago.
I think, if anything, i'd go for the economical NAD 2200 if i were to look for another amp. i have some airbnb guests at moment so can't further test the Jolida until they leave in about a week. From what i'm reading, the Jolida will power the speakers....but will it make them sing ?

Bemopti123

Re: hello, newbie help needed
« Reply #9 on: 22 Feb 2018, 06:02 am »
One thing that is common across all different websites about kappas in general is that they require high current amplifiers to make them work.  Be it aragon 4004s or other sort of bear amps.  Be careful with pushing these speakers with your jolida.  They will play alright, sing, no.

FullRangeMan

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Re: hello, newbie help needed
« Reply #10 on: 22 Feb 2018, 06:04 am »
I believe they will no sing, you would need a speaker around 98dB.
Hi current means solid state amp.

pinegrasss

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Re: hello, newbie help needed
« Reply #11 on: 22 Feb 2018, 06:23 am »
warnings noted ...  :(

pinegrasss

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Re: hello, newbie help needed
« Reply #12 on: 22 Feb 2018, 04:56 pm »

how does a NAD2200PE differ from a NAD2200 ?


FullRangeMan

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Re: hello, newbie help needed
« Reply #13 on: 22 Feb 2018, 09:27 pm »
how does a NAD2200PE differ from a NAD2200 ?
PE is a Class AB circuit design and switchble power supply from NAD stand for Power Envelope, to benefit dynamic power for short transients rather than continuous rms power.

pinegrasss

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Re: hello, newbie help needed
« Reply #14 on: 22 Feb 2018, 09:39 pm »
thanks and actually, looking at the reviews it seems the NAD2200 and NAD2200PE is the same amp