2021 Grand Push-Pull Tube Amplifier Kt88 Double High Pressure Rectification Power AMP Lamp Gz34 260W Phono Pre-Amplifier

• Customization: Available
• Noise: 92dB
• Hi-Fi: Hi-Fi
• Model NO.: GX7
• Activity: Passive
• Operation Mode: Wire / Remote Control
• Speaker System: 2.0 Channel
• Speaker Material: Metal
• Application: Push-Pull Tube Amplifier
• Certification: CE, RoHS, FCC
• Monitor: LED Screen
• THD: <0.005%
• Color: Black
• Customized: OEM, ODM
• Rated Output Power: 45W + 45W (RMS)
• Harmonic Distortion: 1% (1kHz)
• Input Impedance: 100K Ohm
• Snr: 92dB
• Output Impedance: 4 8 16ohm
• Anode Voltage: About 420V
• Weight: 48kg
• Transport Package: Double Strong Carton Box
• Specification: 41*33*20(cm)
• Trademark: Grand
• Origin: China
• HS Code: 8518400090
• Production Capacity: 50PCS/Month

Product Description

Specification:

Technical Parameters:
Speakers output power: 25W + 25W (RMS triode mode)
45W + 45W (RMS ultra-linear mode)

Headphone output power: 300ohm with 900mW , use 270  like a  basic divide to calculate the output power , for example  270 / 300ohm =0.9w for 300ohm headphone  ,   270 / 32ohm = 8.5w for 32ohm headphone 

Input impedance: 100KΩ 

Output Impedance: 4Ω - 8Ω(6)

SNR: 92dB 

output balance of the left and right: <0.5db

Input Sensitivity: 280mV;  520mV (pre input)

Harmonic distortion: 1% (1kHz) Frequency Machine: 15Hz ~ 30kHz (-1.5dB)

Anode voltage: about 420v

Net weight: 22.5kg 

Package weight: 25kg 

power consumption: 260W 


Vacuum tube are Special Customized:

                   Preamp tube:  12AX7 × 1(Equivalant ECC83,CV4004  ECC803,5751)

                   Preamp tube: 12AU7 × 2(Equivalant ECC82,5814,6189 CV4003)      
Power tube: KT88 × 4 (Equivalant 6550)
Rectifier: 5AR4 × 1 (Equivalant GZ34)

Dimension:(W × D × H): 410mm x 335mm x 198mm 

Power supply voltage: ~ 110-120v and 220-240v ± 5% (50/60Hz)

Working conditions: Temperature: 0 ºC ~ 40 ºCHumidity: 20% to 80%

Storage conditions: Temperature: -20 ºC ~ 70 ºC Humidity: 20% to 90%

Features:

Handmade, using scaffolding welding 

using two high quality and wide frequency response EI output transformer

Using a customize Z11 core toroidal power transformer

Amplification and drive part use SAR4 rectifier .

Use 2X12AX7 and 2X12AU7 as amplifiaction,

Use special high selected KT88 tube as push pull power amp lamp,providing switch for the triode connnection and ultra-linear connection modes.The triode connection mode is more suitable for the voice and the sound is more soft, delicat as well as nature. The ultra-linear connection is suitable for the big scence, the sound is more open and lively. 

It has a pure power amplifier ans it can conncet with an independent pre-amp's signal input. 

It has a phono stage input function, which can be connect directly with a MM Vinyl turntables

There is a power tube current control button and an electric meter dial.

Infrared remote control function 

Power Mute delay function

Selection of Japanese high-grade ALPS motor potentiometer.

Easy installation of the plug-type vacuum tube shield 


Grand is one of best chinese hi-fi equiment production manufacturer, 
T heir products have past Certificate of Conformity European(CE)

Amp Name	2021 Grand Push-Pull Tube Amplifier KT88 Double High Pressure Rectification Power Amp Lamp GZ34 260W Phono Pre-amplifier
Technical Parameters	Speakers output power: 25W + 25W (RMS triode mode) 45W + 45W (RMS ultra-linear mode) Headphone output power: 300ohm with 900mW , use 270  like a  basic divide to calculate the output power , for example  270 / 300ohm =0.9w for 300ohm headphone  ,   270 / 32ohm = 8.5w for 32ohm headphone  Input impedance: 100KΩ  Output Impedance: 4Ω - 8Ω(6) SNR: 92dB  output balance of the left and right: <0.5db Input Sensitivity: 280mV;  520mV (pre input) Harmonic distortion: 1% (1kHz) Frequency Machine: 15Hz ~ 30kHz (-1.5dB) Anode voltage: about 420v Net weight: 22.5kg  Package weight: 25kg  power consumption: 260W
Components	Pot/Bias Japan, Sweden brand, etc
Features	Handmade, using scaffolding welding  using two high quality and wide frequency response EI output transformer Using a customize Z11 core toroidal power transformer Amplification and drive part use SAR4 rectifier . Use 2X12AX7 and 2X12AU7 as amplifiaction, Use special high selected KT88 tube as push pull power amp lamp,providing switch for the triode connnection and ultra-linear connection modes.The triode connection mode is more suitable for the voice and the sound is more soft, delicat as well as nature. The ultra-linear connection is suitable for the big scence, the sound is more open and lively.  It has a pure power amplifier ans it can conncet with an independent pre-amp's signal input.  It has a phono stage input function, which can be connect directly with a MM Vinyl turntables There is a power tube current control button and an electric meter dial. Infrared remote control function  Power Mute delay function Selection of Japanese high-grade ALPS motor potentiometer. Easy installation of the plug-type vacuum tube shield
Tube replace table	Preamp tube:  12AX7 × 1(Equivalant ECC83,CV4004  ECC803,5751)                    Preamp tube: 12AU7 × 2(Equivalant ECC82,5814,6189 CV4003)       Power tube: KT88 × 4 (Equivalant 6550) Rectifier: 5AR4 × 1 (Equivalant GZ34)
Customized	OEM, ODM, OBM
Tube Brand	Ruby, Shuguang, JJ, EH
Brand	Grand or custom as per logo plates

Introduction:
Our company has 230 workers, include 15 professional engineers. They supervise the whole producing line from choose material till packing. We can strictly arrange the products as your requests.
Grand Technology is a manufacturer of musical instruments and accessories, which brand is "Grand".
Our factory is located in one of the most important ports of South China, Shekou, Guangdong, Near HK, connects with main highways and airports.
As the professional manufacturer, we supply kinds of musical products such tube guitar amplifiers, hand wired tube guitar amps, point to point amps, replica pedals and amps, electric guitars, acoustic guitars, ukulele, banjo, piano, etc many kinds of musical Instrument gears.
We only provide good quality products with low prices, which are selling well in the international markets, such as USA, Europe, Japan, Korea, South Africa, Kenya, South America, etc. We have plenty experiences in exporting, and be good at holding the mainstream of musical instrument markets.
At present, we establish technology, purchasing, and sales groups to serve our customers. We are thinking in your way, doing as your requests and eager to be your reliable supplier.
Any inquiry will be welcome and highly appreciated.

Custom amplifier project?
We are specialized in OEM/customize guitar, AMP, pedal, etc order, if you need a customize guitar amplifier, please feel free to talk with us.
Please feel free to ask me project example for reference.
Please beware the customize guitar AMP can take as long as 45-90 days depends on AMP schemaitc complex term.
Our Services:
1. OEM/ODM factory direct.
2. Professional engineers who have the ability to create what customers need.
3. High quality guarantee with competitive price.
4. Have a full set of testing equipment for products' functions to ensure reliable quality.
5. Fast feedback within 2 hours.
6. Shipping on-time.
7. Aftersale service, if any reason in our side, we can free exchange for you.
8. All of our product have attained CE, RoHS and related certificates approval.
FAQ:
Q1:What is your Warranty for the products?
A1:We provide 1 Years' Warranty and 7 days Return Services.
More details pls contact our Sales.

Q2:May I buy samples from you?
A2:Yes! You are welcome to place sample order to test our superior quality and service.

Q3: What's the leading time? (How long do you need to prepare my goods?)
A3:10 working days for sample orders.
30 working days for bulk order (based on different quantities).

Q4: How will you deliver my goods to me? How long do I need to wait before my goods arrive?
A4:We offer many shipping ways like DHL, UPS, FedEx, TNT ,EMS to enable our customers get their goods rapidly at door. We also ship by economic method such as air cargo and sea cargo, Direct line, Air Mail according to clients' request.
3-7 days for international express, 5-7 days for air cargo, 20-40 days via sea cargo.

Q5: How is your product quality?
A5:We provide unrivaled Quality - Very rigorous testing process for Incoming Quality Control, Input Process Quality Control, and Final Quality Control for every piece. We follow 20 QC test procedure, and do 100% FQC to ensure your satisfaction.

Q6: Can you put my brand name (logo) on the products?
A6:Yes! We can provide professional OEM services to make it your brand even for your trial sample order.

A7: If your order is over 20pcs, we can make your own logo badge brand on the amp for free! About other more details, it's according to your special requirement.

Q8: What payment method do you accept?
A5: T/T(Bank transfer), Western Union, Paypal, Escrow, etc.

Q9: Do you have any After-Sales service?
A9:Yes! We have professional After-sales service
If you have any technical problem or questions with the goods, welcome to contact our Technical Support Dept. or our sales directly.

Q10: Are you just trading company or factory?
A10: We are professional manufacturer for musical instruments products. We can supply the unrivaled Quality and Services with competitive factory price.

Choose Amp, Choose Grand!!!